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All of these targets are now in android_deps and aliased there. No need
to keep these duplicate .info files and BUILD.gn file.

Bug: 868879
Change-Id: Ie449b546328486072d00a319b681cd7512b8ea5a
Reviewed-on: https://chromium-review.googlesource.com/1173061Reviewed-by: agrieve <agrieve@chromium.org>
Commit-Queue: Peter Wen <wnwen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583235}